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27. The Number of Harmonic Frequencies of a Symmetrical Molecule: A Correction. Watson JKG J Mol Spectrosc; 1998 Oct; 191(2):392-393. PubMed ID: 9753579 [No Abstract] [Full Text] [Related]
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29. [Improved endocardium imaging using modified transthoracic echocardiography with the second harmonic frequency (tissue harmonic imaging)]. Becher H; Tiemann K Herz; 1998 Dec; 23(8):467-73. PubMed ID: 10023580 [TBL] [Abstract][Full Text] [Related]
30. [Comparison of tissue harmonic imaging and standard imaging in echocardiography based on 4 different emission frequencies]. Donal E; Raud-Raynier P; Coisne D; Christiaens L; Ragot S; Herpin D; Allal J Ann Cardiol Angeiol (Paris); 2000 Aug; 49(5):315-21. PubMed ID: 12555516 [TBL] [Abstract][Full Text] [Related]
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33. A dual-frequency excitation technique for enhancing the sub-harmonic emission from encapsulated microbubbles. Zhang D; Xi X; Zhang Z; Gong X; Chen G; Wu J Phys Med Biol; 2009 Jul; 54(13):4257-72. PubMed ID: 19531846 [TBL] [Abstract][Full Text] [Related]
34. Image enhancement by noncontrast harmonic echocardiography. Part I. Qualitative assessment of endocardial visualization. Mulvagh SL; Foley DA; Belohlavek M; Seward JB Mayo Clin Proc; 1998 Nov; 73(11):1062-5. PubMed ID: 9818039 [TBL] [Abstract][Full Text] [Related]
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